This is a very rare Apple II clone, supposedly made by Tektronix. However, the only item inside with a Tektronix branding is the power supply. Apple II clones were popular from 1980 to 1983, and there are literally hundreds of varieties. This model is inside a pressed steel case, which was cheaper to manufacture than PVC. There is a breadboard section, which is common in German clones and easy to work with. The system boots up with the Apple II text at the top of the screen. The connections on the back are slightly odd (see pictures), and the top panel is secured with velcro (???). Special thanks to the personnel of www.apple2clones.com for the information provided for this entry.